Preparation method of low-molecular-weight jellyfish collagen peptide-calcium chelate

The invention belongs to the technical field of food, and particularly relates to a preparation method of a low-molecular-weight jellyfish collagen peptide-calcium chelate. The preparation method comprises the following steps: (1) pretreating fresh jellyfish, homogenizing, and carrying out enzymolysis reaction twice to obtain an enzymolysis product; (2) carrying out separation treatment on the enzymolysis product to obtain peptide with the molecular weight of less than 3KDa; and (3) mixing the peptide with the molecular weight of less than 3KDa with calcium ions, and carrying out chelation reaction to prepare the low-molecular-weight jellyfish collagen peptide-calcium chelate. The low-molecular-weight jellyfish collagen peptide-calcium chelate prepared by the method is high in chelation rate, the additional value of jellyfish resources is improved, the nutritional food supplement market can be enriched, the economic value is further increased, the operation process of the preparation method is simple, complex